It is just sound. It's sound. They go, ah! And then the sound comes back to them and then they know where stuff is. Yeah, and echolocation's a really interesting thing because you have whales and bats that have evolved to use it as a visual medium. Sure. Like being able to bounce the sound off, they can tell where things are. Sure. And people who are born blind are often able to learn and develop some amount of echolocation. Yeah, there was the guy who could ride a bike. That was his thing that got him on local news. There are really fascinating ways that it can be used, but what you are using is sound. Yeah. Bats, the sound they make, some of it might not be audible to our ears, but it is not magic. It is still sound.